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A164322 Numbers n such that n=prime(P)+sigma(P), where P is product of digits of n. 2

%I

%S 14,67673,25688777

%N Numbers n such that n=prime(P)+sigma(P), where P is product of digits of n.

%C The product of the digits of next term (if it exists) is greater than 2*10^8.

%e 25688777=prime(2*5*6*8*8*7*7*7)+sigma(2*5*6*8*8*7*7*7), so 25688777 is in the

%e sequence.

%t Do[If[n=Prime[m]+DivisorSigma[1,m];m==Apply[Times,IntegerDigits[n]],Print[n]],

%t {m,200000000}]

%Y Cf. A000040, A000203, A164323, A164324.

%K base,more,nonn,bref

%O 1,1

%A _Farideh Firoozbakht_, Aug 13 2009

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Last modified June 25 12:55 EDT 2019. Contains 324352 sequences. (Running on oeis4.)